JPH10297831A - Piecing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bring a suction port of an untwisting nozzle close to a passage of reeling thread so as to increase absorption force onto a thread by setting an installation height of the suction port of the untwisting nozzle between an installation face of a piecing nozzle and a piecing hole of the piecing nozzle. SOLUTION: A piecing device 3 is provided with one set of untwisting nozzles 1 and a piecing nozzle 2. The untwisting nozzles 1 are arranged at an equal interval above and below the piecing nozzle 2 and are arranged each on the right and left for a passage of reeling thread of the piecing nozzle 2. Moreover, a nozzle space 7 in which a thread Y is untwisted is provided inside the untwisting nozzle 1, a piecing hole 8 which is the passage of reeling thread and crosses the threads Y is provided inside the piecing nozzle 2, and the center line of the nozzle space 7 crosses the center line of the piecing hole 8 at a right angle when viewed from the side face. For this reason, a suction port 5 draws close to a piecing side by setting an installation height of the suction port 5 more on a piecing hole 8 side than an installation face of the piecing nozzle 2 so that absorption force of the untwisting nozzle 1 is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an untwisting nozzle which sucks a yarn end by a suction flow and untwists the yarn end by a swirling flow.
The present invention relates to a yarn splicing device provided with a yarn splicing nozzle for splicing untwisted yarn ends by swirling flow.

[0002]

2. Description of the Related Art A conventional yarn splicing device 3 of this type is configured to suck a yarn end by a suction flow and untwist the yarn end by the action of a swirling flow, and connect the untwisted yarn ends to each other. And a yarn splicing nozzle 2 for tangling the yarn ends by the action of a swirling flow of air in a yarn splicing hole 8 provided therein, and as shown in FIG. Yarn splicing nozzle 2 that is the reference for
Are provided on substantially the same straight line as the installation surface 9.

The two yarn ends sucked and untwisted by the untwisting nozzle 1 are spliced into one yarn by the yarn splicing nozzle 2. The spliced seam must have strength and have a small difference in thickness from the unspliced part. For this reason, it is important to untwist the yarn ends appropriately so that a part of the fiber bundle is scattered. What influences this untwisting is the installation state of the untwisting nozzle 1. That is, the two untwisting nozzles 1 are connected to the yarn splicing nozzle 2 so that both yarn ends are untwisted by the same amount.
Must be installed symmetrically with respect to In order to achieve symmetry, the mounting height of the untwisting nozzle 1 is also important. In order to facilitate the positioning of the installation height, the untwisting nozzle 1 is set so that the suction port 5 of the untwisting nozzle 1 is at the same height as the installation surface 9 with the installation surface 9 of the yarn splicing nozzle 2 as a reference height. Installation and adjustment.

[0004]

However, a so-called stiff and difficult-to-bend yarn, an elastic yarn that shrinks itself, a yarn that is liable to be wrapped in a helical shape due to the small size of the yarn, etc. There is a problem that a yarn such as a strongly twisted yarn has insufficient suction force and the yarn may not be sucked to the untwisting nozzle.

The present invention has been made by paying attention to such problems existing in the prior art. The challenge is
An object of the present invention is to provide a yarn splicing device that is excellent in introducing yarn into a untwisting nozzle.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, the installation height of the suction port of the untwisting nozzle is set to the installation surface of the yarn splicing nozzle and the yarn of the yarn splicing nozzle. It was provided between the joint holes.

According to the second aspect of the present invention, the installation height of the suction port is set to be substantially the same as the yarn splicing hole. In the invention according to claim 3, the installation height of the suction port of the untwisting nozzle can be changed freely.

[0008] Therefore, according to the first aspect of the present invention, by setting the installation height of the suction port of the untwisting nozzle between the installation surface of the yarn splicing nozzle and the yarn splicing hole of the yarn splicing nozzle, the suction flow of the suction flow is reduced. The area near the suction port having a high flow velocity is brought closer to the yarn path, and acts to increase the suction force to the yarn.

According to the second aspect of the present invention, by setting the installation height of the suction port to be substantially the same as the height of the yarn splicing hole, the suction port becomes closer to the yarn path. According to the third aspect of the present invention, by setting the installation height of the suction port of the untwisting nozzle freely,
It works so as to obtain an optimal suction force according to the yarn type and the like.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The yarn joining device 3 of this embodiment is mainly used for a winding unit 23 of a winder. The winding unit 23 of the winder will be described with reference to FIG. The winding unit 23 supplies the spinning bobbin B, removes yarn defects of the yarn wound on the spinning bobbin B, repeats splicing, and rewinds the yarn from the plurality of bobbins B into one large package P. It is. Winding unit 23
Is described below. The winding unit 23 untwists the two yarn ends by an air flow, entangles the untwisted yarn ends by an air flow, and splices the two yarns. A yarn clearer 24 that detects and cuts the yarn is provided. In addition, a tensor 16 which is a device for applying tension when the yarn Y is wound up, and a balloon which is a device for suppressing a balloon of the yarn Y unwound from the bobbin B and suppressing a rapid change in the yarn tension. A suction mouse 21 which is connected to a breaker 26 and a suction device (not shown) and has a suction port at the tip thereof.
A splicing pipe 20, which is a hollow member connected to a suction device (not shown) and sucking the yarn end Y on the bobbin B side together with the yarn defect at the time of splicing and introducing the yarn end into the yarn path of the yarn splicing device 3; A yarn trap 34 for sucking and holding the yarn end Y cut by the above, and a main body frame 7 are provided. From the yarn supplying bobbin B side to the package P side, a balloon breaker 26, a tensor 25, a yarn trap 34, a yarn clearer 24, a yarn joining device 3, and a package P are sequentially arranged from the downstream side.

The suction port of the suction mouth 21 is usually located between the tensor 25 and the yarn clearer 24. At the time of splicing, the arm 11 pivots to move to the vicinity of the package P, and sucks the yarn end Y of the package P. It has become. The suction port of the relay pipe 20 is provided with the normal package P.
In the middle of the splicing device 3, the splicing pipe 20 turns and moves to a position near the upper portion of the balloon breaker 26 at the time of splicing, and sucks the yarn end Y that is suction-held by the yarn trap 34. .

The yarn splicing device 3 comprises a untwisting nozzle 1 for sucking the yarn end Y and untwisting the yarn end by the action of a swirling flow of air in a nozzle space 7 provided therein; A yarn splicing nozzle 2 is provided which entangles the yarn ends with each other by the action of a swirling air flow and connects the yarn ends. Yarn joint hole 8
And the untwisting nozzle 1 is arranged above and below the yarn joining nozzle 2 so as to be symmetrical to the yarn joining hole 8. Further, as shown in FIG. 1, the suction port 5 of the untwisting nozzle 1 protrudes from the installation surface 9 of the yarn splicing nozzle 2 toward the yarn splicing hole 8. As shown in FIG. 2, a U-shaped holding member 22 for holding the yarn Y introduced into the yarn joining hole 8 is provided so as to act between the yarn joining nozzle 2 and the untwisting nozzle 1. The yarn guides 10 and 11 are provided outside the yarn guides.
Are provided. Outside the yarn guides 10 and 11, a yarn guide 1 is provided.
A thread pulling lever 27 for pushing the thread Y into 0 and 11 is provided. Then, the untwisting nozzle 1 and the yarn guide 10,
Cutters 16 and 17 are provided between 11 and
Clamping devices 18 and 19 are provided between the yarn pulling lever 27 and the yarn guides 10 and 11.

Operation of the winding unit 23 and the yarn joining device 3
The operation of is described below. First, the winding unit 2
In the operation of No. 3, the yarn Y released by the bobbin B suppresses a sudden fluctuation of the unwinding tension by the balloon breaker 26, imparts a tension for winding by the tensor 25, and the yarn is released by the yarn clearer 24. It is wound around the package P while detecting the presence or absence of a yarn defect such as unevenness in thickness. When a yarn defect is detected by the yarn clearer 24, the yarn defect is removed by suction, the yarn Y is spliced by the yarn joining device 3, and the winding is continued until the yarn defect is detected. The above operation is repeated to complete one package P from the plurality of bobbins B.

When a yarn defect is detected by the yarn clearer 24, the yarn clearer 24 operates to cut the yarn Y. The cut yarn Y on the downstream side is captured by the yarn trap 34. The yarn Y on the upstream side (the yarn on the package side) is wound around the package P. Then, the suction mouth 21 is turned, the suction port is brought close to the package P, and the yarn P on the upstream side is sucked while the package P is rotated in the reverse direction, and the suction mouth 21 is turned in the opposite direction to the turning direction to make the yarn clearer. Return the suction port to below 24. Next, the splicing pipe 20 is swirled up to above the balloon breaker 26, and while the yarn Y on the downstream side is sucked at the suction port, the splicing pipe 20 is swung in a direction opposite to the direction in which the splicing pipe 20 is swirled, and the suction port is lowered to the package P. Back.

Intermediate pipe 20 and suction mouth 2
Assuming that the yarn Y sucked in 1 is Yp on the package P side and Yb on the bobbin B side, the yarns Yp and Yb are gripped by the clamp devices 18 and 19 and the yarn splicing device 3 performs the yarn splicing.
One of the grasped yarns Yp and Yb is transferred to the yarn guides 10 and 1 by the yarn pulling lever 27.
The first and second yarns Yb are guided and inserted into the guide grooves 13 and 14 and the yarn splicing hole 8, and the other yarn Yb is also guided and inserted into the guide grooves 15 and 16 and the yarn splicing hole 8.
Yb is pressed and fixed to the yarn splicing hole 8. Next, each yarn Yp, Y
b is cut by the cutters 16 and 17 and the yarn is loosened by returning the yarn pulling lever 27, and the cut yarn end is sucked into the untwisting nozzle by the suction airflow of the untwisting nozzles 1 and 1. It is untwisted by the swirling force of the air injected in the direction opposite to the twist. After the untwisting process, when the yarn pulling lever 27 is operated again, the untwisted yarn ends are pulled out from the untwisting nozzles 1 and 1, and both yarn ends are in the yarn splicing holes 8 of the yarn splicing nozzle 2. Superimposed. In this state, the overlapped portion of the two yarn ends is entangled by the action of the compressed fluid by the swirling flow of air, including the untwisted portion in the yarn joining hole 8, to form a single yarn. Done.

The yarn splicing device 3 and the untwisting nozzle 1 used in the yarn splicing device 3 will be described in detail below. Yarn joining device 3
Comprises a pair of untwisting nozzles 1 and a yarn splicing nozzle 2, and the untwisting nozzles 1 are arranged at equal intervals above and below the yarn splicing nozzle 2, and the yarn path of the yarn splicing nozzle 2 is , Respectively. A nozzle space 7 for untwisting the yarn Y is provided inside the untwisting nozzle 1, and a yarn splicing hole 8 which is a yarn path and entangles the yarn Y is provided inside the yarn splicing nozzle 2. The center line of the nozzle space 7 and the center line of the yarn splicing hole 8 are arranged to be orthogonal. For this reason,
When the installation height of the suction port 5 is set closer to the yarn joining hole 8 than the installation surface 9 of the yarn joining nozzle 2, the suction port 5 approaches the yarn path, and the suction force of the untwisting nozzle 1 increases. If the distance between the yarn path and the untwisting nozzle 1 is simply shortened, the yarn splicing hole 8 as the yarn path may be brought closer to the installation surface 9 side, but the untwisting range 28 of the yarn Y does not change. While expanding the untwisting range 28 of the yarn Y, the untwisting nozzle 1
In order to increase the suction force of the
It is preferable to extend the suction port 5 of the untwisting nozzle 1 to the yarn splicing hole 8 side.

The untwisting nozzle 1 used in the yarn splicing device 3 of the present embodiment includes a suction port 5 for sucking a yarn to be untwisted, and a nozzle body 32. A nozzle hole 4 for injecting air from a source to create a swirling flow and a nozzle space 7 for untwisting a yarn are provided, and the suction port 5 and the nozzle space 7 are connected to each other. A nozzle hole which is formed at a predetermined distance on the suction port 5 side of the nozzle space 7 on the side opposite to the suction port 5 and which is obliquely opened so that air is jetted in a direction opposite to the twisting direction. 4 are provided. The air injected from the nozzle hole 4 generates a swirling flow in the direction opposite to the twist in the nozzle space 7, generates a negative pressure near the suction port 5, and generates a suction action near the suction port 5 due to the negative pressure. work. By this suction action, the yarn Y is introduced into the untwisting nozzle 1. The introduced yarn Y starts untwisting the yarn end in the nozzle space 7 due to the swirling flow of air. The twist in the untwisting direction due to the swirling flow propagates to the yarn Y, so that the untwisting proceeds and reaches a portion in contact with the yarn joining surface 6. At the inner diameter of the opening end of the suction port 5, the yarn contact surface 6 with which the sucked yarn Y contacts is curved so that the yarn Y sucked up to the nozzle space 7 does not bend at a steep angle, and its surface Are smooth, and the yarn Y is free to roll.

Here, the suction port 5, which is the introduction portion of the yarn Y, will be described in detail. The suction port 5 has a protruding portion 3 whose inner diameter is curved and whose diameter is larger than the diameter of the nozzle body 32.
0 is provided, and the installation height of the suction port 5 is determined by the length of the protrusion 30. This is because, by changing the length of the protruding portion 30 according to the type of yarn, it is possible to adjust the suction force optimally according to the type of yarn, and at the boundary between the protruding portion 30 and the nozzle body 32 (the base portion 31). ) Is a reference plane for the amount of protrusion and serves as a stopper. As a result, the positioning of the suction port 5 is facilitated, and the assembling work and the maintainability are improved. In the present embodiment, the installation height of the suction port 5 is determined by the length of the protrusion 30, and the installation height draws a smooth curve when the yarn Y is introduced into the untwisting nozzle 1. It is in such a position.

The suction force of the untwisting nozzle 1 depends on the flow rate of the suction flow near the suction port 5. If the flow velocity is high, the suction power increases, and if the flow velocity is low, the suction power decreases. The flow rate is determined by the amount of air flowing into the suction port 5. That is, the flow rate of the suction flow is high near the suction port 5 where the amount of air flowing into the suction port 5 is small. Although the constant velocity line 33 of the flow velocity of the suction flow is shown in FIG. 3, the flow velocity becomes slower as the distance from the suction port 5 is increased, and the suction force is greatly reduced.
As a method of increasing the suction force, a method of providing a rectifying guide near the suction port 5 can be considered. However, since the amount of inflow of air is large at the tip of the rectifying guide near the yarn path, the flow velocity of the suction flow is slow and the suction force is low. Not so strong. Again, in order to increase the suction force, it is preferable that the installation height of the suction port 5 is set closer to the yarn splicing hole 8 of the yarn splicing nozzle 2 than the installation surface 9 so that the suction port 5 and the yarn path are as close as possible. By increasing the suction force of the untwisting nozzle 1, it is possible to reliably introduce a so-called strong strain yarn or an elastic yarn whose yarn itself is reduced into the untwisting nozzle.

When the suction port 5 is extended to the yarn splicing hole 8 of the yarn splicing nozzle 2, the length of the yarn Y introduced into the untwisting nozzle 1 becomes longer, and the amount of the yarn Y untwisted increases. , Untwisting range 28
Spreads. Since the untwisting range 28 is wide, even in the yarn Y having a long fiber length, only a part of the fiber length is not untwisted (most of the fiber length remains untwisted),
As well as being able to untwist sufficiently, untwisting in which the fiber is cut by the swirling flow occurs, the number of fibers constituting the yarn Y is reduced, and the action by the swirling flow is sufficiently transmitted. As a result, the entanglement between the fibers is strengthened, so that the seam is strengthened, and the number of entangled fibers is reduced, so that the seam can be prevented from becoming thick.

Furthermore, since the yarn surface 6 of the present embodiment is smooth and the yarn Y is curved along the yarn surface 6, the twist in the untwisting direction is applied to the yarn surface 6. Without stopping, the yarn Y rotates and rolls, continues to propagate to the yarn Y, and untwists the yarn Y to an upstream side from a position where the yarn Y is in contact with the yarn joining surface 6. That is, the twist propagation range (untwisting range 28) is further expanded. Then, since the yarn is untwisted to the upstream side of the yarn joining surface 6, the stress generated by the untwisting is dispersed without being concentrated at the corner of the suction port 5, and the untwisting range 28 of the yarn Y is reduced.
In other words, since the fibers are sufficiently defibrated even upstream of the suction port 5, it is difficult to break the yarn.

The present invention may be embodied as follows. (1) In the yarn splicing device 3 of the present embodiment, the installation height of the suction port 5 of the untwisting nozzle 1 is such that when the yarn Y is introduced into the untwisting nozzle 1, a smooth curve is drawn. The length of the protruding portion 30 is determined so as to be located at the position. However, when it is difficult to introduce the thread into the untwisting nozzle 1 having a very strong strain, the suction port is used to further increase the suction force. 5 needs to be closer to the thread path. In that case, the length of the protrusion 30 may be determined so that the suction port 5 is substantially parallel to the yarn splicing hole 8. That is, the yarn Y is reliably introduced into the untwisting nozzle 1 by bringing the yarn path and the vicinity of the suction port 5 where the flow rate of the suction flow is high as close as possible. At this time, when the suction port 5 projects beyond the yarn splicing hole 8, the yarn Y passes through the suction port 5 and the untwist nozzle 1
Contacting the outer wall of the device causes a suction error. For this reason, the upper limit of the installation height of the suction port 5 should be up to the yarn splicing hole 8.

(2) The yarn joining surface 6 of the suction port 5 has the untwisting range 2
It is most preferable that the suction port 5 be curved so as to further widen the opening 8 and reduce yarn spatter. However, it is also possible to simply project the suction port 5 toward the yarn joining hole 8. It is preferable that the surface when the yarn contact surface 6 is curved is smooth because the yarn Y rolls and rotates. Further, the diameter of the protruding portion 30 is larger than that of the nozzle main body 32, but may be the same as that of the nozzle main body 32.

(3) Further, the yarn joining device 3 of the present embodiment
The suction force is changed by changing the amount of protrusion 30 of the untwisting nozzle 1. However, as shown in FIG. 4, the suction force is fitted to the installation surface 9 of the conventional yarn joining device 3 and the yarn joining nozzle 2. The suction force may be changed by replacing plates 35a and 35b having suction holes 5 and having different thicknesses. Plate 3 with suction port 5
Since the installation height of the suction port 5 can be freely changed by 5a and 35b, the position of the nozzle hole 4 of the untwisting nozzle 1 that requires delicate setting is determined, and the optimum suction force according to the yarn type is determined. Can be prepared, and can be efficiently performed at the time of setup change or the like.

[0025]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, the suction port of the untwisting nozzle is provided between the installation surface of the yarn splicing nozzle and the yarn splicing hole of the yarn splicing nozzle, so that the suction port is formed. A yarn splicing device that is close to the yarn path and increases the suction force for sucking the yarn. Can be provided.

According to the second aspect of the present invention, by setting the installation height of the suction port to be substantially the same as the yarn splicing hole, the suction port becomes closer to the yarn path. Can be introduced.

According to the third aspect of the present invention, the installation height of the suction port can be freely changed, so that an optimum suction force according to the yarn type can be obtained. Yarn can be sucked into the untwisting nozzle.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a yarn splicing device of the present invention.

FIG. 2 is a schematic view of a winding unit of a winder in which a yarn joining device is used.

FIG. 3 is a sectional view of a main part of an untwisting nozzle used in the yarn splicing device of the present invention.

FIG. 4 is a sectional view of a main part of another embodiment of the yarn joining device of the present invention.

FIG. 5 is a sectional view of a main part of a conventional yarn joining device.

[Explanation of symbols]

 Reference Signs List 1 untwisting nozzle 2 yarn splicing nozzle 3 yarn splicing device 5 suction port 6 yarn joining surface 7 nozzle space 8 yarn splicing hole 9 installation surface Y yarn

Claims (3)

[Claims] 1. A yarn having a untwisting nozzle for sucking a yarn end by a suction flow and untwisting the yarn end by a swirling flow, and a yarn splicing nozzle for joining the untwisted yarn ends together by a swirling flow. In the splicing device, the height of the suction port of the untwisting nozzle is set between the installation surface of the yarn splicing nozzle and the yarn splicing hole of the yarn splicing nozzle. 2. The yarn splicing device according to claim 1, wherein an installation height of the suction port is substantially equal to a height of the yarn splicing hole. 3. The yarn splicing device according to claim 1, wherein the installation height of the suction port of the untwisting nozzle is changeable.